Penggunaan Tanin Kulit Acacia mangium Willd pada Resin Sistem
PEN~GUNAANTANIN KULIT
Acacia mangiwn Willd. PADA RESIN SISTEM'
(Utiiizathof Tannin from the Bark of Acacia trumgiwn Wdid
in Resin System)
Lina ~arlinasari~,
E. ~ o f f i e lSuminar
~,
S. ~ c h m a d i ~
ABSTRACT
The purpose of this study was to evaluate the character of tannin Acucia mungjum barks and to compare
dimensional stability and strength of MDF prepand using tannin from A. m a n g h in combination with
commercial UF,PF resin systans. The bPrk was water cxtncbd, in a water to bark ratio of 5 : 1 at tmpmtm
range d60-70°C for 4 hour. Tannin-adhesiveformulations pnpand mrc: 1) UF-resin, 2) tannin cxhact+ UF
= 50% + 5% 3) tannin extract + UF a
+ 40%, 4) PF-resin, 5) tannin extract + PF = 50.h + SO%, 6)
tannin extract + PF = 60% + 4%. The eextractin content of bark was 22.2g0/6. The reactivity of extractives
towards formaldehyde, as measured by Stiasny-method, was about 90.94% Thc results indicated that the pH
decreased with increasing of W i n conccntnrtkm and the viscusity range of vsrious fsrmulation tanninadhesives was betuna 2.5 to 30 poise. To a certain extent, the content of tannin in UFmin sys&rns hm
positive influences on thickness swelling, and modulus of rupture (MQR), while the internal b d sea@ to
decnase as a high smowt of tsanin wrs used in UF-resin systems. Negative influence was observed in thc
thickness swelling and Mband stnngth due to the use of &H&
I
in PF-nsin system. However, modulus of
rupture (MOR) seuned to be positiveky .&ctul.Further works arc a#dcd for the impmvcmcntof tma&-UF
and tannin-PF resin blends properties.
Keywords: tannin, Acucia mangium Witld. OF and PF, resin system, MDF
Selatan, Selandia Baru, Australia,
Skandiiavia, bahkan Malaysia telah
Penelitian secara sistematik tentang memulai penggunaan tanin
penggunaan tanin sebagai perekat telah perekat atau sebagai aksek?rator p d a
dimulai sejak 1950 oleh Dalton di perekat fen01 untnk kayu lapis ddn @uk
Australia. Meningkatnya harga minyak komposit lainnya awal tahun 1980-an
bumi dan perekat sintetis yang disebabkan (Ayla dan Weissmann, 1984; Coppens et
oleh krisis minyak bumi pada tahun 1970- al., 1980;Yazaki et al., 1998). Dewasa ini
an menjadi momentum penggunaan tanin di Eropa Tengah tanin menjadi perhatian
sebagai perekat (Ayla dan Weissmann, pentmg, bahkan di Jennan tanin sebagai
1984). 6i Afrika Selatan, Amerika
--
-
-
-
'Sob.gia dari pga ini dismpailra
sswnaa=
"The 4' International Wood Science Symposium" di Scrpong, 2-5
% ~ ~ ~ J T I - N - I F ~ K ~ ~ ~ ~ ~ P ~ ~ I P B
'Facult). of Faatry md EOOSOgy. CkUingen University
'StdJurusan Kimh, FMIPA IPB
Jd
T b i @ MPsii Hutan. Falrultas Keh-
IPB
Vol. XV, No. 1,2002
PENGGUNAAN TANIN KULIT
Acacia mangiwn Willd. PADA RESIN SISTEM1
(Utiiization of Tannin from the Bark of Acacia trumgiwn Willd. In Resign
System)
Lina Karlinasari2, E. Roffael3, Suminar S. Achmadi4
ABSTRACT
The purpose of this study was to evaluate the character of tannin Acacia mangium barks and to
compare dimensional stability and strength of MDF prepared using tannin from A. mangium in
combination with commerciai UF, PF resin systems The bark was water extracted, in a water to bark
ratio of 5:1 at temperature range of 60-70°C for 4 hour. Tannin-adhesive formulations prepared were:
1) UF-resin, 2) tannin extract + UF = 50% + 50%, 3) tannin extract + UF = 60% + 40%, 4) PF-resin,
5) tannin extract + PF = 50% + 50%, 6) tannin extract + PF = 60% + 40%. The extractive content of
bark was 22.29%. The reactivity of extractives towards formaldehyde, as measured by Stiasnymethod, was about 90.94%. The results indicted that the pH decreased with increasing of tannin
concentration and the viscosity range of various formulation tannin-adhesives was between 2.5 to 30
poise. To a certain extent, the content of tannin in UF-resin systems has positive influences on
thickness swelling, and modulus of rupture (MOR), white the internal bond seemed to decrease as a
high amount of tamtin was used in UF-resin systems. Negative influence was observed in the
thickness swelling and internal bond strength due to the use of tannin in PF-resin system. However,
modutus of rupture (MOR) seemed to be positively affected Further works are needed for the
improvement of tannin-UF and tannin-PF resin blends properties
Keywords: tannin, Acacia mangium Willd. UF and PF, resin system, MDF
1
Sebagian dari paper ini disampaikan pada The 4th International Wood Science Symposium di Serpong, 2-5
September 2002
2
Staff Pengajar JTHH Fakultas Kehutanan IPB
3
Faculty of Forestry and Ecology, Goettingen University
4
Staff Pengajar Jurusan Kimia, FMIPA IPB
Acacia mangiwn Willd. PADA RESIN SISTEM'
(Utiiizathof Tannin from the Bark of Acacia trumgiwn Wdid
in Resin System)
Lina ~arlinasari~,
E. ~ o f f i e lSuminar
~,
S. ~ c h m a d i ~
ABSTRACT
The purpose of this study was to evaluate the character of tannin Acucia mungjum barks and to compare
dimensional stability and strength of MDF prepand using tannin from A. m a n g h in combination with
commercial UF,PF resin systans. The bPrk was water cxtncbd, in a water to bark ratio of 5 : 1 at tmpmtm
range d60-70°C for 4 hour. Tannin-adhesiveformulations pnpand mrc: 1) UF-resin, 2) tannin cxhact+ UF
= 50% + 5% 3) tannin extract + UF a
+ 40%, 4) PF-resin, 5) tannin extract + PF = 50.h + SO%, 6)
tannin extract + PF = 60% + 4%. The eextractin content of bark was 22.2g0/6. The reactivity of extractives
towards formaldehyde, as measured by Stiasny-method, was about 90.94% Thc results indicated that the pH
decreased with increasing of W i n conccntnrtkm and the viscusity range of vsrious fsrmulation tanninadhesives was betuna 2.5 to 30 poise. To a certain extent, the content of tannin in UFmin sys&rns hm
positive influences on thickness swelling, and modulus of rupture (MQR), while the internal b d sea@ to
decnase as a high smowt of tsanin wrs used in UF-resin systems. Negative influence was observed in thc
thickness swelling and Mband stnngth due to the use of &H&
I
in PF-nsin system. However, modulus of
rupture (MOR) seuned to be positiveky .&ctul.Further works arc a#dcd for the impmvcmcntof tma&-UF
and tannin-PF resin blends properties.
Keywords: tannin, Acucia mangium Witld. OF and PF, resin system, MDF
Selatan, Selandia Baru, Australia,
Skandiiavia, bahkan Malaysia telah
Penelitian secara sistematik tentang memulai penggunaan tanin
penggunaan tanin sebagai perekat telah perekat atau sebagai aksek?rator p d a
dimulai sejak 1950 oleh Dalton di perekat fen01 untnk kayu lapis ddn @uk
Australia. Meningkatnya harga minyak komposit lainnya awal tahun 1980-an
bumi dan perekat sintetis yang disebabkan (Ayla dan Weissmann, 1984; Coppens et
oleh krisis minyak bumi pada tahun 1970- al., 1980;Yazaki et al., 1998). Dewasa ini
an menjadi momentum penggunaan tanin di Eropa Tengah tanin menjadi perhatian
sebagai perekat (Ayla dan Weissmann, pentmg, bahkan di Jennan tanin sebagai
1984). 6i Afrika Selatan, Amerika
--
-
-
-
'Sob.gia dari pga ini dismpailra
sswnaa=
"The 4' International Wood Science Symposium" di Scrpong, 2-5
% ~ ~ ~ J T I - N - I F ~ K ~ ~ ~ ~ ~ P ~ ~ I P B
'Facult). of Faatry md EOOSOgy. CkUingen University
'StdJurusan Kimh, FMIPA IPB
Jd
T b i @ MPsii Hutan. Falrultas Keh-
IPB
Vol. XV, No. 1,2002
PENGGUNAAN TANIN KULIT
Acacia mangiwn Willd. PADA RESIN SISTEM1
(Utiiization of Tannin from the Bark of Acacia trumgiwn Willd. In Resign
System)
Lina Karlinasari2, E. Roffael3, Suminar S. Achmadi4
ABSTRACT
The purpose of this study was to evaluate the character of tannin Acacia mangium barks and to
compare dimensional stability and strength of MDF prepared using tannin from A. mangium in
combination with commerciai UF, PF resin systems The bark was water extracted, in a water to bark
ratio of 5:1 at temperature range of 60-70°C for 4 hour. Tannin-adhesive formulations prepared were:
1) UF-resin, 2) tannin extract + UF = 50% + 50%, 3) tannin extract + UF = 60% + 40%, 4) PF-resin,
5) tannin extract + PF = 50% + 50%, 6) tannin extract + PF = 60% + 40%. The extractive content of
bark was 22.29%. The reactivity of extractives towards formaldehyde, as measured by Stiasnymethod, was about 90.94%. The results indicted that the pH decreased with increasing of tannin
concentration and the viscosity range of various formulation tannin-adhesives was between 2.5 to 30
poise. To a certain extent, the content of tannin in UF-resin systems has positive influences on
thickness swelling, and modulus of rupture (MOR), white the internal bond seemed to decrease as a
high amount of tamtin was used in UF-resin systems. Negative influence was observed in the
thickness swelling and internal bond strength due to the use of tannin in PF-resin system. However,
modutus of rupture (MOR) seemed to be positively affected Further works are needed for the
improvement of tannin-UF and tannin-PF resin blends properties
Keywords: tannin, Acacia mangium Willd. UF and PF, resin system, MDF
1
Sebagian dari paper ini disampaikan pada The 4th International Wood Science Symposium di Serpong, 2-5
September 2002
2
Staff Pengajar JTHH Fakultas Kehutanan IPB
3
Faculty of Forestry and Ecology, Goettingen University
4
Staff Pengajar Jurusan Kimia, FMIPA IPB